Gear-wheel.



' J. R. GILCREST.

GEAR WHEEL. MBPLICATmN FILED 1AN.2I. |914.

Paten md Mar. 13,- 1917.

oEEioE.

JESS. R. GILCREST, OF TORUNT, OHIO.

GEAR-WH EEL.

Application filed January 21, 1914.

lb all 'whom z'tmay concern:

lic it known that 1, duss. R. (iua'ilucs'r, a citizen of the United States, residing at rloronto, inthe county of Jefferson and State of (lhio, have invented new and useful lmprorem'ents in Gear-Wheels, of which the following is a speeilication.

The primary object of the invention is the provision of a gear wheel in which the toothed rim is made detachable so as to be replaced when worn or otherwise nnfitted for future effeeti ve service.

The invention contemplates a gear Wheel embodying ahub and spokes, and a toothed rim detac'hably connected to the outer ends of the spokes, the hub and spokes being prcf erably of integral formation and the toothed rim being formed with lugs in position to register Within the spokes to which theyl are fastened prefe ably by bolts, the openings in the lugs and outer ends of the spokes being formed therein atti-1e time of casting such i paits, thereby avoiding the cost of snbseA `quent drilling.

The invention further contemplates a gear Wheel having its rim'construeted so as to give Way'whei snbjected to abnormal or unusnal strain, thereby preventing injury to the arts to be driven. I

i T 1e invention consists of the novel fea tures, details of construction and combination of parts, which hereinafter Willibe more particularly set forth, illustrated in the accompanying drawing, andpointed olit'ln the appended claim.4

Referring to the drawing, forminga part/ of the specification,

Figure 1 is a front view of a gear yWheel embodying the invention". 2 Fig. Q is an edge 'View partly vin section. Fig. 3 is a detail View of part of the vtoothed rim. 4 i

Fig. 4 is a detail yiew of a portion-of the hub and spokes. 1

Corresponding and like parts are referred toin the following description., and indicated'in all the views ofthedrawing, by the same reference characters, The gear ivheel comprises a` hub l and spokes@1 the latter having their outer lends flattened in the plane ofthe Wheel provided Awith laterall y extending flanges 2a and formedwith openings to receive 'bolts or Specification of Letters Patent.

ratei ma Mar. 1.a', ism."

Serial No. 813,468.

fastenings 3 by mear s of which the rim is detachably connected to the outer ends of the spokes. The toothed rim 4 is formed' at intervals with lugs, which extend inward and are flattened so a i to match the flattened outer ends of the spokes, said lugs haring' openings (5 to register with the openinf'ggs in the outer ends of the spokes so as to receive the fastenings or bilts The combined. strength of the bolts is less than that of the Spokes so that `the former will be severed upon excessive forca being applied to the toothed rim. The ci' ustruction is sach aste admit of the toothed rim being readily placed when worn or when reinlered unfit for further service fi 'om any canse.

A web 7 is formed between certain adjacent spokes and has a slot 8 formed therein to receive fastening i means when securing the gear n'heel to a shaft or other part. This prevents movement of the gear 'wheel on the shaft and insures companion gears being held in mesh against possible slippine.

Frouithe foregoing description, taken in connection with the accompanying f lrawinfr. the advanlages of @he eonstrnctiim and of the methodof operation will be readilyn apparent to those skilled in `the art to which the invention appel tainS. and 'while '.lf have descriliied the princ ple of operation of the invention. together with 'the device ahiifl. l' now consider toile. the beat einliodinnait thereof, l desire to have-'it understood 'that the device shown is merely illustrative, and that such changes 1r ay be made when desired as are within the soupe of' the claim append` ed h reto. f l H ing thus desi ribed the invention what is claimed as new, is

In a wheel. in combination, a hub having a series of radialspokes, each of said spokes being formed witl a terminal flat portion provided with a right angular integra-l shoulder upon tht latter, an annular rim provided with a circumferentially spaced apart series of inte gral perforated lugs, said annular rim including a flat annular bottom? `portion formed `fllsh with all of said lugs,

and an annular 1' ortion .inclined i'ithref spect to and forinodalpon said flat. annular portion, said annu' ar rim being formed with a circumferential series of teeth upon its outer side, .sa-id tee ali belng formed across the fglme of thlilatnnnular bottom portion and wheel, and means 4for holding said rm M9011 thmvipfclil'xd annular poxtlon of said against displacement. v

saldlgsnnd'the ilut annuylurportxon of In testimony whereof I atllx my sig-nature annui. r rim resting upon the spokes in presencovof gwo'witnesses. f 'ith the' l s engagngtho Shoulders of tho JESS. R. GILCRIJST.

thore ycuusmg tho inclined annular Witnesses: ppg'tlon of .said rim to project beyond tho $.13. TAYLOR, @pokes and increasing the diameter of said J. W. SHANE. 

